Abstract:

The contents of polyphenols and flavonoids and the antioxidant activities in vitro of aqueous extracts from the leaf teas of Ilex latifolia Thunb and Ilex kudingcha C.J. Tseng were determined. It was found that the aqueous extract from Ilex kudingcha C.J. Tseng had both higher polyphenol content and in vitro antixodiant performance than that from Ilex latifolia Thunb. The correlation analysis among five antioxidant evaluation methods in vitro demonstrated that there was a good correlation among them (R2 ＞0.8478), and the correlation between DPPH and ABTS+ free radical scavenging assays was the most significant (R2 = 0.9967).

Key words: Ilex kudingcha C.J. Tseng leaf tea, Ilex latifolia Thunb leaf tea, polyphenol, flavonoid, antioxidant activit